The U2 formulation was developed from over 15 years of research spent in the bait fish, fish transporting and sport fishing industries. U2 is not only a convenient liquid, but also a single phase, fully functional water conditioner for use in fresh water and salt water. U2 should be used when conditioning water entering the live well, bait tanks, minnow buckets and in fish transport situations. Approved for use with The Oxygenator. Non toxic to humans, pets and aquatic life. Removes Nitrites, ammonia, chlorine, chloramines and heavy metals. Adds essential electrolytes. Replaces skin slime. Stops bleeding.